g-C3N4 改性Bi2O3 对盐酸四环素的光催化降解

doi:10.11901/1005.3093.2022.479

材料研究学报

2023, Vol. 37

Issue (8): 633-640 DOI: 10.11901/1005.3093.2022.479

研究论文

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g-C₃N₄ 改性Bi₂O₃ 对盐酸四环素的光催化降解

任富彦¹^,³, 欧阳二明²(

)

^1.南昌大学工程建设学院南昌 330031
^2.南昌大学资源与环境学院南昌 330031
^3.新疆科技学院会计学院库尔勒 830091

Photocatalytic Degradation of Tetracycline Hydrochloride by g-C₃N₄ Modified Bi₂O₃

REN Fuyan¹^,³, OUYANG Erming²(

)

^1.School of Engineering and Construction, Nanchang University, Nanchang 330031, China
^2.School of Resources and Environment, Nanchang University, Nanchang 330031, China
^3.School of Accounting, Xinjiang University of Science and Technology, Kuerle 830091, China

引用本文:

任富彦, 欧阳二明. g-C₃N₄ 改性Bi₂O₃ 对盐酸四环素的光催化降解[J]. 材料研究学报, 2023, 37(8): 633-640.
Fuyan REN, Erming OUYANG. Photocatalytic Degradation of Tetracycline Hydrochloride by g-C₃N₄ Modified Bi₂O₃[J]. Chinese Journal of Materials Research, 2023, 37(8): 633-640.

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摘要:

使用液相沉淀法和热聚合法制备Bi₂O₃/g-C₃N₄复合催化剂，用SEM、XRD、XPS、FT-IR和紫外可见漫反射等手段对其微观形貌、晶体结构和光催化性能进行了表征。结果表明，这种Bi₂O₃/g-C₃N₄复合光催化剂的形貌较好、分布均匀，具有较高的光催化性能；复合催化剂Bi₂O₃/g-C₃N₄-30%的光催化性能最好，用300 W模拟可见光氙灯照射2 h后对盐酸四环素(TCH)的去除率为70%；捕获实验的结果表明，光催化降解盐酸四环素(TCH)的主要活性物种为超氧自由基(·O $2 -$ )。

关键词 ：无机非金属材料, 光催化, 抗生素, 降解, Bi₂O₃, 半导体材料

Abstract：

Composite catalysts of Bi₂O₃/g-C₃N₄ were successfully prepared by means of liquid-phase precipitation and thermal polymerization methods. The microscopic morphology, crystal structure and photocatalytic properties of the composite catalysts were characterized by SEM, XRD, XPS, FT-IR and UV-Vis diffuse reflection etc. The results show that the prepared Bi₂O₃/g-C₃N₄ composite photocatalyst has good morphology and uniformity of grains. The Bi₂O₃/g-C₃N₄ composite catalyst showed good photocatalytic performance. Among all the prepared composite catalysts, the composite catalyst Bi₂O₃/g-C₃N₄-30% had the best photocatalytic performance. The removal rate of tetracycline hydrochloride (TCH) by Bi₂O₃/g-C₃N₄-30% composite catalyst was 70%, which was 1.66 times that of pure Bi₂O₃ and 1.44 times that of pure g-C₃N₄. In addition, the photocatalytic degradation of tetracycline hydrochloride was verified by capture experiments. The main active species of (TCH) is superoxide radical (·O₂^-).

Key words： inorganic non-metallic materials photocatalysis antibiotics degradation Bi₂O₃ semiconductor materials

收稿日期: 2022-09-06

ZTFLH:

X703.1

通讯作者: 欧阳二明，副教授，youmer@ncu.edu.cn，研究方向为水处理理论与技术

Corresponding author: OUYANG Erming, Tel: 15170217718, E-mail: youmer@ncu.edu.cn

作者简介: 任富彦，男，1996年生，硕士

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https://www.cjmr.org/CN/10.11901/1005.3093.2022.479 或 https://www.cjmr.org/CN/Y2023/V37/I8/633

图1 制备Bi2O3/g-C3N4复合材料的示意图

图2 g-C3N4、Bi2O3和Bi2O3/g-C3N4材料的SEM图谱、Bi2O3/g-C3N4材料的TEM图谱及Bi2O3/g-C3N4的EDS图

图3 g-C3N4、Bi2O3和Bi2O3/g-C3N4材料的XRD谱

图4 g-C3N4、Bi2O3和Bi2O3/g-C3N4材料的FT-IR谱

图5 Bi2O3/g-C3N4复合催化剂的XPS图

图6 g-C3N4、Bi2O3和Bi2O3/g-C3N4材料的UV-Vis漫反射光谱和(Ahv)1/2与光子能量(hv)的关系

图7 不同催化剂对TCH的降解效率及其反应过程中的一阶动力学拟合图

图8 Bi2O3/g-C3N4复合材料降解TCH的可循环性

图9 在不同捕获剂条件下盐酸四环素的去除率及其相应的去除率柱状图

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